Ni-rich oxides, LiNi_xMn_yCo_zO₂ (NMC), are among leading candidates for cathode materials in Li-ion batteries. However, they are mostly fabricated by coprecipitation approach under complex conditions, which usually produces large secondary particles composed of aggregated primary particles. Undesirable cation mixing and crack propagation upon cycling block ion and electron transport, result in fast capacity fading and poor rate capability. Herein, we present an ultrasound-triggered cation chelation and reassembly route for synthesizing one-dimensional precursor with homogeneous element distribution at the atomic level. This process is accomplished by the synergistic combination of ultrasound and surfactant, which can disperse reactants and remove hydration shells surrounding cations so as to accelerate chelating reaction, and then separate and assemble chelates into one dimensional structure. The whole synthesis time is only 20 min (8.9 min of ultrasonic working time) in an open vessel under natural ambient conditions. One-dimensional LiNi_0.6Mn_0.2Co_0.2O₂ has a high reversible capacity (184 mAh·g⁻¹ at 0.1 C) and long cycling stability (95.1% and 82.4% capacity retention for 100 and 1000 cycles, respectively). The short charging time of 76 s is realized at super high current rate of 20 C, which is very important to improve the competitiveness of electric vehicles relative to fuel vehicles. Our synthetic approach can provide a general strategy for the growth of mixed-metal-EDTA chelate precursors by changing the feeding ratio of Ni²⁺, Mn²⁺ and Co²⁺ cations in reaction for fabricating NMC cathode materials with other compositions.

富镍氧化物LiNi _x Mn _y Co _z O ₂（NMC）是锂离子电池正极材料的领先候选者之一。然而，它们大多是在复杂条件下通过共沉淀法制备的，通常会产生由聚集的初级颗粒组成的较大的次级颗粒。阳离子的不期望混合以及循环离子和电子传输时裂纹的扩展会导致快速的容量衰减和差的速率容量。在这里，我们提出了一种超声触发的阳离子螯合和重组途径，用于合成在原子水平上具有均一元素分布的一维前体。此过程是通过超声和​​表面活性剂的协同组合来完成的，它可以分散反应物并去除阳离子周围的水合壳，从而加速螯合反应，然后将螯合物分离并组装成一维结构。在自然环境条件下，在敞口容器中，整个合成时间仅为20分钟（超声波工作时间8.9分钟）。一维LiNi_0.6 Mn _0.2 Co _0.2 O ₂具有高的可逆容量（0.1 C时为184 mAh·g ^-1）和长的循环稳定性（分别在100和1000次循环中保持95.1％和82.4％的容量）。在20 C的超高电流速率下可实现76 s的短充电时间，这对于提高电动汽车相对于燃料汽车的竞争力非常重要。我们的合成方法可以通过在制备具有其他成分的NMC阴极材料的反应中改变Ni 2 ⁺，Mn ²⁺和Co ²⁺阳离子的进料比来为混合金属EDTA螯合物前体的生长提供一般策略。